Existence of monostable fronts for a KPP infinite-difference numerical scheme
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866909437875191808 |
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| author | Garénaux, Louis Hupkes, Hermen Jan |
| author_facet | Garénaux, Louis Hupkes, Hermen Jan |
| contents | We study the existence of traveling wave solutions for a numerical counterpart of the KPP equation. We obtain the existence of monostable fronts for all super-critical speeds in the regime where the spatial step size is small. The key strategy is to transfer the invertibility of certain linear operators related to the front solutions from the continuous setting to the discrete case we are interested in. We rely on resolvent bounds which are uniform with respect to the step size, a procedure which is also known as spectral convergence. The approach is also able to handle infinite range discretizations with geometrically decaying coefficients that are allowed to have both signs, which prevents the use of the comparison principle. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_16580 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Existence of monostable fronts for a KPP infinite-difference numerical scheme Garénaux, Louis Hupkes, Hermen Jan Numerical Analysis Analysis of PDEs 39A14, 39A12 (Primary), 39A70, 47A10, 47N40, 47A12 (Secondary) We study the existence of traveling wave solutions for a numerical counterpart of the KPP equation. We obtain the existence of monostable fronts for all super-critical speeds in the regime where the spatial step size is small. The key strategy is to transfer the invertibility of certain linear operators related to the front solutions from the continuous setting to the discrete case we are interested in. We rely on resolvent bounds which are uniform with respect to the step size, a procedure which is also known as spectral convergence. The approach is also able to handle infinite range discretizations with geometrically decaying coefficients that are allowed to have both signs, which prevents the use of the comparison principle. |
| title | Existence of monostable fronts for a KPP infinite-difference numerical scheme |
| topic | Numerical Analysis Analysis of PDEs 39A14, 39A12 (Primary), 39A70, 47A10, 47N40, 47A12 (Secondary) |
| url | https://arxiv.org/abs/2412.16580 |